I guess after 27 years of loyal employment, you will likely have a wealth of transferrable skills to offer, and hopefully hit the ground running in you particular field. Needless to say, tomorrow is the beginning of the rest of your life, and to a degree, you are in charge, not your former bosses.
HR & recruitment is my own background, and I promise you 100% that the best thing to do is have a breather,and don't be cynical. For around 3 days after you cease work you will feel pretty pissed off and maybe a touch of low self esteem...but that will pass.
On the 4th/5th day, make a timetable. Do things. Produce your CV, load it onto Monster and so on..they are all there. You know the script
Some one somewhere needs you skill/s. It's a question of you finding each other..thats the hard bit. Use all the local Manpower type agencies too...they are OK in a body factory way..and get registered with around 10 blue chip Consultancies.
Build an EXEL sheet to keep track of who you approached, name of contact, result, and so on. That way, you will see results quicker than the national unemployment grim reapers say. Being systematic is a great mental booster too...it let's you and others see the effort.
Hiring is starting to show green shoots again, but it's still very industry/local demographic/ and skill dependant